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Table 2 Socio-demographics and adverse health conditions by migrant status and delivery mode

From: Association between migration status and caesarean section delivery based on a modified Robson classification in China

  All subjects(n = 40,621) Subjects of Group 1 based on Robson Classification(n = 13,616)
Migrant status Delivery mode Migrant status Delivery mode
Residents n(%) Migrants
n(%)
p CSMR
n(%)
MICS
n(%)
Vaginal Birth n(%) p Residents
n(%)
Migrants
n(%)
p CSMR
n(%)
MICS
n(%)
Vaginal Birth n(%) p
Total numbers 27,169 13,452   7496 10,827 22,298   8491 4675   391 403 12,822  
Maternal age at delivery
  < 20 479 (1.8) 242 (1.8) < 0.001 180 (2.4) 133 (1.2) 408 (1.8) < 0.001 185 (2.1) 85 (1.8) < 0.001 11 (2.8) 7 (1.7) 252 (2) < 0.001
 20–34 23,210 (85.4) 11,772 (87.5)   7316 (97.6) 7467 (69.0) 20,199 (90.6)   8278 (92.6) 4408 (94.3)   380 (97.2) 319 (79.2) 11,987 (93.5)  
  ≥ 35 3480 (12.8) 1438 (10.7)   0 (0) 3227 (29.8) 1691 (7.6)   478 (5.3) 182 (3.9)   0 (0) 77 (19.1) 583 (4.5)  
Ethnicity
 Han 26,878 (98.9) 12,973 (96.4) < 0.001 7349 (98) 10,618 (98.1) 21,884 (98.1) 0.809 8849 (99.0) 4527 (96.8) < 0.001 382 (97.7) 396 (98.3) 12,598 (98.3) 0.713
 Others 291 (1.1) 479 (3.6)   147 (2) 209 (1.9) 414 (1.9)   92 (1.0) 148 (3.2)   9 (2.3) 7 (1.7) 224 (1.7)  
Health insurance
 Yes 18,307 (67.4) 6215 (46.2) < 0.001 5187 (69.2) 5665 (52.3) 13,670 (61.3) < 0.001 6310 (70.6) 2409 (51.5) < 0.001 138 (35.3) 236 (58.6) 4523 (35.3) < 0.001
 No 8862 (32.6) 7237 (53.8)   2309 (30.8) 5162 (47.7) 8628 (38.7)   2631 (29.4) 2266 (48.5)   253 (64.7) 167 (41.4) 8299 (64.7)  
Occupation
 Non-managerial position 21,501 (79.1) 9856 (73.3) < 0.001 5820 (77.6) 8305 (76.7) 17,232 (77.3) 0.312 7034 (78.7) 3473 (74.3) < 0.001 286 (73.1) 295 (73.2) 9926 (77.4) 0.207
 Managerial position 84 (0.3) 138 (1)   43 (0.6) 51 (0.5) 128 (0.6)   34 (0.4) 46 (1.0)   3 (0.8) 2 (0.5) 75 (0.6)  
 Unemployed 543 (2) 813 (6)   266 (3.5) 362 (3.3) 728 (3.3)   141 (1.6) 238 (5.1)   11 (2.8) 12 (3) 356 (2.8)  
 Workers (conducting physical labor) or others 5041 (18.6) 2645 (19.7)   1367 (18.2) 2109 (19.5) 4210 (18.9)   1732 (19.4) 918 (19.6)   91 (23.3) 94 (23.3) 2465 (19.2)  
Marital status
 Married 27,105 (99.8) 13,410 (99.7) 0.154 7478 (99.8) 10,792 (99.7) 22,245 (99.8) 0.332 8916 (99.7) 4662 (99.7) 0.987 389 (99.5) 401 (99.5) 12,788 (99.7) 0.465
 Not married 64 (0.2) 42 (0.3)   18 (0.2) 35 (0.3) 53 (0.2)   25 (0.3) 13 (0.3)   2 (0.5) 2 (0.5) 34 (0.3)  
Adverse health conditions a
 Yes 6102 (22.5) 2674 (19.9) < 0.001 1695 (22.6) 3188 (29.4) 3893 (17.5) < 0.001 1493 (16.7) 664 (14.2) < 0.001 67 (17.1) 111 (27.5) 1979 (15.4) < 0.001
 No 21,067 (77.5) 10,778 (80.1)   5801 (77.4) 7639 (70.6) 18,405 (82.5)   7448 (83.3) 4011 (85.8)   324 (82.9) 292 (72.5) 10,843 (84.6)  
  1. a Having one or more adverse health conditions (these conditions were not (or not severe enough to be) absolute contraindications to vaginal delivery)